gratify|gratified|gratifies

他买了一大盒冰淇淋来满足自己对甜食的渴望。

He bought a big box of ice cream to ___gratify his craving for sweets.

收到你的感谢信让我非常高兴。

Your thank-you letter really ___gratified me.

看到学生进步总是让老师感到欣慰。

Seeing students improve always ___gratifies the teacher.